-------- Original message -------- From: allison via cctech <cct...@classiccmp.org> Date: 2017-06-26 14:50 (GMT-08:00) To: cct...@classiccmp.org Subject: Re: TV Typewriter project nearing completion
On 06/26/2017 11:29 AM, Brad H via cctech wrote: > Thanks Nick! > > I had thought about selling PCBs or creating a kit, but I lack the skill to > draft it in PCB CAD software. The boards I made come from scans of the plans > (on swtpc.com), and I really had to tweak those to get them to work. And > even then, while I was able to correct for size I missed de-skewing them, so > the molex connectors for the bus between boards do not line up perfectly, > making connecting boards a bit of a trick. I hadn't realized just how badly > scanning could distort artwork until I got my hands on an original copy of > the Radio Electronics construction guide for the Mark-8. Comparing the > artwork in it to the scanned copies online showed just how bad the scanner > mangled things. > > Unfortunately I missed a perfect opportunity to acquire an original > construction guide when an actual vintage TVT came up on ebay. The auction > was for the TVT and the seller threw in the guide he'd bought. I lost that > auction to Grant Stockly. As it turns out, he plans to diassemble that TVT, > scan the boards and make kits available. I was disappointed that he was > going to dismantle an original piece (he does intend to reassemble it), but > am glad some quality kits will come as a result. We had been negotiating to > send my original Mark-8 boards for a scan, since they are unbuilt, but I have > been leery about shipping them off to the US ever since they were almost lost > in transit to me. > > If folks are interested I could make my 'corrected' (photoshopped) artwork > available somewhere. Maybe someone could fix it further. I may even fix it. > Last week I acquired some actual vintage 1973 PCB stock, and now have an > opportunity to go the last mile on authenticity and actually rebuild the TVT > with correct PCBs. That'd make it almost indistinguishable from an original. > But.. it'd also be a ton of (re)work.. > > Brad > > > -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Nick Allen > via cctalk > Sent: Sunday, June 25, 2017 12:54 PM > To: cctalk@classiccmp.org > Subject: Re: TV Typewriter project nearing completion > > wow impressive work Brad! Thanks for blogging about it, it's fun to watch > you progress. Ever consider selling some of the PCB boards, and coming up > with a BOM list, so we can recreate some too? > > > --- > This email has been checked for viruses by AVG. > http://www.avg.com > > I'll have to pull out the one I built in '75 as my first Altair non TTY terminal. Bet it still works and has the 64 char mod. The only issue was >stability of the >position adjustments. One shots for >timing... still not a fan. >Allison Cool! Is it the Don Lancaster design or the TVT II by Ed Colle? Would love to see some pictures if you have any.
